Here is the full list of all 53 Mini Rollers achievements.
Get 50 gems in 1 level
Finish the tutorial
Unlock the Wood Ball
Unlock the Cloth Ball
Unlock the Moss Ball
Unlock the Magnet Ball
Unlock the Bounce Ball
Unlock the Tech Ball
Unlock the Heavy Ball
Unlock the Float Ball
Unlock the Shrink Ball
Unlock the Glow Ball
Unlock the Ghost Ball
Unlock the Speed Ball
Unlock the Boom Ball
Unlock the Frost Ball
Unlock the Fire Ball
Unlock the Eye Ball
Unlock the Vile Ball
Unlock the Galaxy Ball
Become the Pearl Ball
Complete World 1
Complete World 2
Complete World 3
Complete World 4
Complete World 5
Complete World 6
Complete World 7
Complete World 8
Complete World 9
Look at the credits screen
Look at the help screen
Collect all trophies and visit your collection
Get 50 gems in 30 levels
Get 50 gems in 50 levels
Get 1,000 total gems
Get 5,000 total gems
Get 20,000 total gems
Look at your complete creature horde
Get an A ranking in all levels
Get a B ranking in all levels
Get a C ranking in all levels
Get a goal time that ends in :00
Beat a level with 1 second left on the clock
Go really really fast
Take over 20 minutes to complete a level
Die to a Young Murktoad
Beat the final boss without taking damage from it
Purchase all 10 skins.
Awaken the Gazers
Hush now, little one.
Become the Slime Ball
Die as a ball made of metal 66 times